Anonymous
Along with PB, Googling at YouTube will bring up many lectures. And there are other sources, such as the MIT and other edu sites.
Maximus Williamitis
There are none. Adequate, maybe, but good is only a matter of perspective.
Anonymous
Big Ideas, World of Ideas, CBC's Ideas, BBC's Forum, RadioLab, and TedTalks often have philosophy topics. Plus there's always In Our Time for the history of it.
Guv
Philosophy Bites is good.